i have the same error and it resolved
the error: A critical error has occurred. Please check the Event Viewer for further details.
error details:
AssemblyVersion:7.3.3
PortalID:0
PortalName:Kwader
UserID:1
UserName:host
ActiveTabID:62
ActiveTabName:Site Settings
RawURL:/ar-sa/Admin/Site-Settings
AbsoluteURL:/Default.aspx
AbsoluteURLReferrer:
UserAgent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.111 Safari/537.36
DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke
ExceptionGUID:26b13aa7-7100-4c36-abeb-2cac817cc278
InnerException:Valid values are between 1318 and 1500, inclusive. Parameter name: year
FileName:
FileLineNumber:0
FileColumnNumber:0
Method:System.Globalization.UmAlQuraCalendar.CheckYearRange
StackTrace:
Message:
DotNetNuke.Services.Exceptions.PageLoadException: Valid values are between 1318 and 1500, inclusive.
Parameter name: year ---> System.ArgumentOutOfRangeException: Valid values are between 1318 and 1500, inclusive.
Parameter name: year
the solution:
open sitesettings.ascx file from the path "Site Location\DesktopModules\Admin\Portals\sitesettings.ascx"
and put this code in it
<%
datepickerExpiryDate.Culture = new System.Globalization.CultureInfo("en-US");
%>